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Powerful bass performance

Rockford Fosgate enjoys a well-deserved reputation for building high-quality mobile audio products. Their Power Series amps sit at the top of the car audio food chain, with proven durability and proprietary technologies that deliver stronger, more reliable performance than most other amps on the planet today.

Rockford Fosgate's high-tech solutions yield more power

Power Series amplifiers actively monitor their speakers' performance using Rockford Fosgate's Constant Power technology. A speaker's impedance naturally fluctuates as it performs. So, just like your cruise control increases the engine's RPM to maintain your car's speed uphill, Constant Power maintains this amp's output by increasing its internal voltage and current when the speaker's impedance rises. This results in up to a 25% increase in the amp's total power output, especially in the crucial range below 50 Hz where a sub amp really has to shine.

Rugged construction, massive bass

Rockford Fosgate builds each Power Series mono amplifier with heavy-duty, state-of-the-art components. The award-winning Dynamic Thermal Management design manages the temperature of the internal components, distributing heat evenly for higher efficiency and lower distortion. The unique heat sink allows the heat to escape more readily so the high-power output transistors stay cooler and last longer.

2,500 watts of raging Rockford Fosgate power

The T2500-1bdCP mono sub amp uses an efficient Class bd design to deliver up to 2,500 watts to your subwoofer system. This amp can even drive a 1-ohm load, so you can get massive bass out of a wide variety of system designs. Competitors, you can tie two of these amps together to power a single sub system. The variable 24/dB per octave crossover creates a more natural sounding transition from your speakers to your subs. And the 2-year warranty tells you that Rockford Fosgate stands behind this bass behemoth.

My system has plenty of power. Who needs an amp?

You might think you don't need an amp because you have a 400-watt system in your car, or because your new stereo puts out 50 watts a channel. But those are peak wattage ratings, which may boil down to 15 or 20 watts per channel, using the more realistic RMS rating. An amp sends your speakers the power they need to deliver your music with clarity and impact, whether you're using factory speakers or high-performance components. And low-frequency reproduction requires lots of power, so an amp is an absolute must if you're adding a sub to your system.

Product Research

Features

Overview: With its super efficient Class-BD circuit
topology, the Rockford Fosgate T2500-1bd assures maximum power output. Due to
its dedicated low frequency response, this amplifier is optimized for mid-bass
speakers or subwoofers only. The amplifier is 1-ohm stable (2,500 watts x 1) and
will drive a pair of 4-ohm DVC subwoofers or quad-configuration of 2-ohm DVC
subwoofers with ease.

Class bd Design: Rockford Fosgate bd topology is a
revolutionary patented design, integrating a technology that is more efficient
than typical class AB and has lower distortion than class D designs. Punch bd
amplifiers are 75-80% efficient vs. 20-60% efficient class ab amplifiers. This
means, more power from your amplifier with less drain on your vehicles
electrical and charging system.

MEHSA3: MEHSA3 reduces MOSFET temperatures, lowers
distortion, increases durability and prolongs the output device life span.
MEHSA3 (Maximum Efficiency Heat Sink Application - gen. 3) is a proprietary
process that yields up to five times better heat transfer than traditional FET
mounting techniques, using the exact same components. A multi-layer insulated
metal substrate operating with minimal thermal resistance spreads heat both
downward and outward to quickly dissipate heat from each device across the
heatsink. This process combined with Rockford's optimized heatsink designs, DSM
(Discrete Surface Mount) technology and MOSFET devices, allows the amplifier to
squeeze more watts per cubic inch from every output device as well as provide
consistent thermal stability. The 3rd generation creates a dielectric layer
between the ceramic topside and the aluminum base that retains all of the
electrical isolation and capacitive coupling of the original MEHSA material
increasing it's thermal conductivity. The higher power handling results in a 20%
reduction in thermal impedance.

TO-247 MOSFETs: The Rockford Fosgate amplifier use custom
TO-247 MOSFETs. These have 60% more metal tab area for more power capacity,
lower impedance and improved heat dissipation over traditional TO-220 MOSFETs
found in many other amplifier. The MOSFET transistor is the best type of device
to use when building a high quality mobile amplifier. The TO-247 has 60% more
metal tab area and its unique, fully encapsulated design is capable of housing a
silicon die (the heart of the MOSFET) twice as large as the TO-220. The larger
die provides more power handling capacity. Additionally, the extra metal tab
area ensures that no matter what size silicon die is inside, the thermal
impedance will always be lower than in the TO-220 due to improved heat
dissipation.

Power and Protection LEDs: The LEDs are
located on top of the amplifier. A blue Power LED illuminates when the amplifier
is turned on. A red Thermal LED illuminates if the amplifier overheats. The yellow Protect LED illuminates if a short
circuit or too low an impedance is detected at the speaker connections. When any
of the protection circuits engage, the amp automatically shuts down until the
problem is corrected.

Controls

Mode Switch: This function
is used to set the amplifier between single amplifier use, and Master or Save
for when connecting multiple bd amplifiers together. The first amplifier in the
series should be set to Master and the subsequent amplifiers set to Slave. This
allows one gain, crossover, infrasonic filter, and bass boost setting for all
daisy-chained amplifiers.

Internal Crossover: The
amplifier's internal crossover has a 24 dB/octave slope. The crossover point is variable from
35Hz to 250Hz.

Punch EQ: Punch EQ acts as a variable bass boost; 0-18 dB at 45 Hz.

Infrasonic Filter: The infrasonic high pass filter is designed to prevent frequencies below the
audible range from being applied to the subwoofer from the amplifier,
consequently improving subwoofer performance and power handling, particularly in
vented enclosures. The crossover point is fixed at 28 Hz, the slope is 12
dB/octave, and the filter can be turned on or off to suit your preference.

Phase Switch: This feature is used when bridging two bd amplifiers
together using a bd Sync cable (sold separately) to phase one amplifier
180-degrees from the other when driving a common load.

Connections

Power Connections: The power
and ground connections are nickel-plated set-screw wire terminals and will
accommodate up to 1/0-gauge wire. An external 300-amp fuse (not included) must be
installed on the power wire. The remote turn-on terminal will accept wire
sizes up to 8-gauge. The supplied hex-key
is required to tighten/loosen the terminals.

Speaker Connections: The nickel-plated
set-screw speaker terminals will accept wire sizes from 16 to 8-gauge.The included
hex-key is required to tighten/loosen the
terminals.

Note: Although there are two sets
of speaker terminals, the amplifier still produces a monaural signal.
The A and B speaker outputs are internally wired in parallel.

Differential Input RCA Inputs: The amplifier features a pair
of differential RCA input jacks for easy connection of signal level input.
Differential input circuitry measures the voltage of both the positive (+) and
negative (-) portions of the input signal, subtracting the voltage common to
both conductors (noise); resulting in a cleaner signal. Reducing the noise on
the input then improves the sound quality of the output. The RCA input jacks are
nickel-plated to resist signal degradation caused by corrosion.

RCA Outputs: The amplifier also features a pair of RCA
"Pass-Thru" jacks which provide a convenient source for daisy-chaining an
additional amplifier without running an extra set of RCA cables from the front
of the vehicle to the rear amplifier location. The RCA output jacks are
nickel-plated to resist signal degradation caused by corrosion.

Remote Punch EQ (PEQ) Connection: An RJ-45 jack is provided for connecting an optional remote PEQ control (575ROCKPEQ,
sold separately). If you use the remote PEQ, the Punch EQ control on the
amp is disabled, and replaced by the remote.

Note:
Previous model Punch Bass and Para-Punch remotes will not work with this amp.

bd Sync Connection: This amplifier has a proprietary 6-pin mini-DIN
connector. When operating two of these amplifiers together in a bridged mode, a
bd Sync cable (sold separately) must be used. This will allow the two
independent frequency carrier generators in each unit to b synchronized.

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Great amp

Written By Anonymous, Millbury, MA on Thursday, October 16, 2014

This is a great amp supplies great power and runs constant with terrific bridge capabilities

Pros:Amazing amp with constant power

Cons:Need lots of power to power this amp with low gauge wire ...big upgrades

replacement review

Written By Steve, Seattle, WA on Thursday, August 25, 2011

Recieved this amp as a replcement for an Orion HCCD-250 that was stolen. Love this amp unfortunately I don't have the subwoofers to put all its power to use. Birth certificate had 3137watts @ 1ohm and is rated at 2500 @ 1 ohm. Currently using to power 2 RFP3 dual 4ohm VC 12"s. Running a 4Ohm load to the amp as not to blow the subwoofers. Great bass for the music I listen to and would fit well with the people that love alot of bass it you turn it up. Currently ordered 2 RF T2 12"s to maximize the output of the amp. This is my second T series amp and it aims to please. Current system is alpine CDA-105 w/ imprint, T600 amp for doors, focal utopia 6.5" component front, focal utopia 4" component rear, and T2500 with 2 P3 12"s.